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    Metal-Fab Type B Chimney Pipe

    Metal-Fab Type B chimney pipe is a rigid, double walled design that incorporates an insulating air space. This kind of chimney is designed for use with Category 1 appliances including gas-fired furnaces, boilers, water heater, and fireplaces. Rigid chimneys must be pieced together during installation, and the Metal-Fab system has a SureLock connection that is effected without the need for tools. Various diameters and lengths are available, as well as all of the accessory pieces necessary for a complete installation.
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    2 Questions & 2 Answers
    from Berlin, NH asked:
    August 30, 2017
    Is type B the double-wall form with insulation in the middle?
    1 Answers
    It is not, Class B is made of aluminum. Insulated double wall pipe is Class A chimney.
    Brennan W.
    on August 31, 2017

    from Lake Stevens, WA asked:
    August 25, 2014
    Is the b-type the same as ht? I have to replace sections through my roof. It is for an oil burning boiler that is 6' tall.
    1 Answers
    It is not. Type B venting is aluminum and galvanized steel construction and is only suitable for venting gas appliances. Oil burning appliances require the use of Class A chimney, with type HT being required by some models. If you are able to find any manufacturer information on the current piping, I will be happy to check availability of the proper replacement parts.
    on August 26, 2014

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